Multiple lightning-arrester.



C. E. COX. MULTIPLE UGHTNING ARRESTBR. AYPLICATION ULEB 0GT.25.1912.

Patented Jan. 12, 1915.

wmlll WITNESSES CHARLES ELMER COX, OF EATON, OHIO.

AMULTIPLE LIGHTNING-ARRESTER.

Specification of Letters Patent.

Patented Jan. "12, .-1.9151

Application filed October 25. 1912. Serial No. 727,670,

To aU /r/mm l muy concern.'

Be it known that I, (himnos Ipo-u1u: Cox. a citizen of the United States` residing at Eaton, in the county of Preble and State of Ohio, have invented certain new and useful Improvements in Multiple LightninU-Arrestcrs, of which the followingr is a specilieation. reference being had therein to the acconipanyingdrawing.

My invention relates to multiple lightningtr arresters `and more particularly to multiple line pro'tective devices for telephonie or tele-- graphic lilies.

The object of the invention is to provide a cheap, compact and ellicient protective device-for the protection of telephone and telegraph equipment against lightning and other electric disturbances, adapted to be mounted upon the line supporting means such as the yard or cross-arm of a line-pole and to takecare of a plurality of lines such all the lines carried by a single cross-arm or all the lines carried by a single pole.

A further object is to provide such a Kdevice of maximum durability b v embodying: thc same in a structure of a maximum number of relatively massive parts.

The invention, however. is not limited mere-ly for use on a line-pole but is` also adapted for use Ain a `iunction box or in an v other situation where a pluralitiv of lines to be protected run along the same path or converge upon a common point.

My invention is illustrated in the accompanying drawings in which:

Figure 1 is an axial cross-section of the device assemble-d. Fig. 2 is a top plan view with the outer parts removed. Fig. 3 is a lgeneral view showingr the dc\ ice mounted on the cross-arm oi :i line-pole and the manner oi connection.

Referring to Figs. 1 and L. the. main body of the device consists of a block of insulating material 1 in the iform ota truncated cone having a recess extending upwardly from,-

lower end of each conductor 6 extends''doverY ward into the chamber 2 and is threade( td receive a pair of lock nuts 9. VThe i also centrally perforated to form a duct t) in which is fitted a ground bolt or coduc i 11. The ground conductorll is threaded l its upper end `to receive the clamping n or lock nuts 15. and is also threadeda lower end to receive the lock nuts 1G. Upon the surface 8 of the top 4 is pl4 thin perforated spacing. dis'km12 of other insulating' .niatei'ial. A Ulpon'thfiss ing; disk 12 lis placed a circular groundfpllite 1J.. The spacing disk 12 and ground p 4 w have substantially theV samedialneten .the

upper surface ot' the top 1 and are'centrally 70 perforated to pass over the upper cifd the ground conductor 11 through mea which and the lock nuts 15 theyQa-relclaln .v into place. Other formsof sparkga'pslpiay be used inplace of the -disk..12, ythe esy 'itial 75 feature. `of my invention beingthegroup ng o1' the spark gaps. p f

Outlet holes 17 corresponding in v,ini l) to the number of eonductors arepkrmifidel in the wall 3 for the passageof the spider 80 wires 1S which wires are conn ectedj .,ttle conductors G by means of the lock nuts Q 'aiild lead out to the diii'erent linestol protectie i The lground wire 19 enters through allele 20m near the base and is connected to thfgi'ouiid 85 conductor 11 by means of thelock nuts f6. i

The upper portion of the deuiceis'provided with a protective can or coter, i2 adapted to wedge down over thezoutsidc'l the tapering wall 3. and form. a\\atertight 90 closure i'or the spark gaps. '.1

The whole device is adapted to be mounted upon the cross arm of a. linep0le. by'ineans ol the brackets 22.bolted tothe circular 1 at its base. Y f`.

The duct 10 isshownlrecessedat its upper end to receive a collar 23 formed-integrally with the ground conducto.; 'andbelov that, surface so that the ground conductn` cati! i i be held!l rigidly in position.; independently `of the'nuts 15` thus-f-zicilitating thefinitial. assembling and subsequent inspectignef the spark Igaps, or the adjustment ,oftliespe ing disk and ground plate. .Othermeansiolim binding the ground conductorfmax besilbstitnted for the shoulder, such as a nut i threaded to the upper end of the ground conductor. The conductor 11 forms` a guide rod for kee ing the peripheries of the members 10 an 12 in register with the upper edge of the body portion l.

big. 3 illustrates the manner in which the device is installed on a line-pole. Tige body portion (1) of the device .is secured to the upper surface and at the center of a cross arm 24 by means of the` brackets 22, the different spider Wires 18 are connected to the different line wires 25, respectively, and preferably insulated from each other by insulation -of a thickness greater than the width of the spark gap, and the ground wire 19 is connected to ground in a well known manner.

Although I have shown the device mount-- ed upon th'e top of a cross arm, it 1s not limited to this particular method of installation but may be mounted in various positions as called for b v dilerent conditions.-

It is to be understood that I do not limit myself to the specific embodiment of the invention as herein illustrated and described, but contemplate all such variants thereof as will fall within the scope of the appended claims. For example; the holes 17 and 20 may be provided with suitable means to prevent the entrance of moisture; any well known means of connection may be substituted for the lock nuts 9 and 16; the lu s or brackets 22 ma be integral with tle body portion l, an further, thebody portion may be rectangular instead of circular in form. y

Having thus described my invention what I claim and desire to secure by Letters Patent is:

1. In a lightning arrester, the' combination of an insulating body in the form of an inverted cup having a recess extending upwardly from the base so as to form-askirted chamber with a transverse u per wall, conducting members extending rom within the chamber through the upper wall to the uper surface thereof. a ground late extendmg over the upper surface an the ends of the conducting members, a spacing member interposed between the ground pl'ate."` nd the upper surface having perforations in register-"with the ends of the conducting members, an additional conducting member ,-"extending from within the chamber through the upper wall and said spacing `ldiearus and terminating in electrical contact with the ground plate, inlet holes in the skirt ofthe chamber for the admission of wires to the conducting members within vside walls thereof, a ground plate overlying the exposed ends of the terminals on the upper side of the head and in metallic connection with said ground terminal, insulating and spacing means interposed below the ground plate to maintain the same above the exposed ends of the terminals, leaving clear discharge gaps over said terminals and a clearopening for the passage.

of the ground terminal, and means for connecting line wires to the lower ends of all the terminals within the cup of the insulating body.

3. A lightning arrester comprising the following instrumentalities: an insulating body in the form of an inverted cup with a flat horizontal head, and a surrounding skirt, line terminals and a ground terminal spaced a art and extending through said head, wit their up er ends expose on the outside thereof and, the lower ends lying within the chamber of the cup so as to be entirely surrounded b the skirting side walls thereof, a groun plate overlying the ex osed ends of the terminals on the upper si e of the head and in metallic connection with said ground terminal, an insulating spacing late interposed between the ground plate an said exposed ends of the terminals with openings 'registering with said terminals and a separate openin for the assage of the ground terminal, an means or connecting CHARLES ELMERV cox. y

Witnesses:

H. R. MAwrr, ERMA Ramas. 

